CN101877933B - Flexible circuit board - Google Patents
Flexible circuit board Download PDFInfo
- Publication number
- CN101877933B CN101877933B CN2009102461849A CN200910246184A CN101877933B CN 101877933 B CN101877933 B CN 101877933B CN 2009102461849 A CN2009102461849 A CN 2009102461849A CN 200910246184 A CN200910246184 A CN 200910246184A CN 101877933 B CN101877933 B CN 101877933B
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- flexible pcb
- area
- stress concentration
- connecting portion
- main part
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Abstract
The invention relates to a flexible circuit board which comprises a main body part and a joining part, wherein the main body part is configured with an electronic component; the joining part is connected with a connector; two ends of the connector are respectively connected with the main body part and the joining part; and the joining part comprises a buffer area and a stress concentration area, wherein the buffer area is positioned between the stress concentration area and the joining part, and the stress concentration area is positioned between the buffer area and the main body part.
Description
[technical field]
The present invention is a kind of flexible PCB, particularly a kind of flexible PCB with buffering area.
[prior art]
Because global Information And Communication product is flourish, also drives printed circuit board (PCB) (PrintingCircuit Board, market PCB), and flexible printed circuit board (Flexible Print Circuit; FPC) be the application mainstream of many electronic products at present.
Flexible PCB is widely used on the small-sized portable system that needs compact substrate, like clamshell phone, mobile computer, wrist-watch and hearing aids, and application such as electron medical treatment product.In addition, recent flexible electronic more expanded application to radio frequency identification (Radio FrequencyIdentification is RFID) on label and the photoelectric subassembly.
Yet, when using flexible PCB, the restriction in some designs is arranged, as: the size of flexible PCB will go up some with the area of copper backing greatly than rigid printed circuit board (PCB); Secondly, must make special weld tabs storehouse, otherwise copper may break away from dielectric layer; Moreover, in the edge of flexible PCB, if the insufficient space of being reserved then will cause peeling off thereby impacting between layer and the layer.In addition, when flexible PCB receives when bending, it is damaged because of stress deformation can cause circuit, with the LCD MODULE display abnormality that makes its application.Therefore, developing the technology that addresses the above problem is the direction that industrial circle is desired most ardently development.
[summary of the invention]
In view of this, the present invention proposes a kind of flexible PCB, comprises: main part, dispose electronic building brick; The junction surface is connected in connector; Connecting portion, its two end connects aforementioned body portion and junction surface respectively, and above-mentioned connecting portion comprises buffering area and area of stress concentration.Wherein, above-mentioned buffering area is between area of stress concentration and junction surface, and area of stress concentration is then between buffering area and main part.
Flexible PCB of the present invention, its buffering area are the individual layer plate body.Because when flexible PCB is connected to connector; The place of joining of flexible PCB and connector is prone to the phenomenon that arches upward; If the buffering area of a lamina body structure is set in the place of joining; Make the place of joining become one, produce the problem that arches upward in the time of then avoiding flexible PCB to be connected to connector than soft zone.
In addition, flexible PCB provided by the present invention, the area of stress concentration that it has a multilayer plate body utilizes the intensity of multi-layer sheet body structure, and then strengthens the intensity of bearing strain.When flexible PCB was connected to connector, the connecting portion of above-mentioned flexible PCB suffered external force and produces stress, made the turnover of connecting portion; Thereby be easy to generate strain and impaired, therefore, one area of stress concentration is set so that increase the intensity of turnover in connecting portion; Moreover, because connecting portion has a buffering area in the place of joining of flexible PCB and connector, therefore will make the position of bearing maximum stress betide buffering area; So can reduce the stress that above-mentioned turnover possibly suffer, and then avoid turnover to damage, and when making the junction surface be connected to circuit control panel; Can reach the function that signal transmits, can normal operation in order to circuit board.
Below in execution mode, be described in detail detailed features of the present invention and advantage; Its content is enough to make any related art techniques person of being familiar with to understand technology contents of the present invention and implements according to this; And according to content, the claim and graphic that this specification disclosed, any related art techniques person of haveing the knack of can understand purpose and the advantage that the present invention is correlated with easily.
[description of drawings]
Fig. 1 is the sketch map of the flexible PCB that first embodiment of the invention disclosed.
Fig. 2 is flexible PCB that first embodiment of the invention the disclosed sketch map that is connected with connector.
Fig. 3 A to 8 is in the flexible PCB that second embodiment of the invention disclosed, the sketch map of the various aspects of connecting portion.
Fig. 9 is in the flexible PCB that second embodiment of the invention disclosed, and main part comprises the sketch map of multilayer plate body.
Figure 10 is the structural representation of the multilayer plate body of the area of stress concentration that first embodiment of the invention disclosed
Figure 11 is the structural representation of the individual layer plate body of the buffering area that first embodiment of the invention disclosed.
Figure 12 connects the cross-sectional view of buffering area for the area of stress concentration that first embodiment of the invention disclosed.
Figure 13 to 15A and Figure 15 B are the sketch map of the flexible PCB that fourth embodiment of the invention disclosed.
[primary clustering symbol description]
1 ... ... the .. flexible PCB
10 ... ... the .. main part
11 ... ... the .. junction surface
12 ... ... the .. connecting portion
12a ... ... first of ..
12b ... ... second of ..
121 ... ... the .. buffering area
123 ... ... the .. area of stress concentration
1231 ... ... the .. turnover
13 ... ... the .. electronic building brick
14 ... ... the .. connector
15 ... ... the .. circuit control panel
16 ... ... .. coats material
[embodiment]
See also Fig. 1,2 and 3A shown in; Be the flexible PCB 1 that is disclosed in the first embodiment of the present invention; Include main part 10, junction surface 11 and connecting portion 12, wherein, above-mentioned flexible PCB 1 can be applicable to the backlight module etc. of instrument board, car light, LED illumination or the display of automobile.
Connecting portion 12, its two end connect aforementioned body portion 10 and junction surface 11 respectively, and above-mentioned connecting portion 12 comprises a buffering area 121 and an area of stress concentration 123.Wherein, above-mentioned buffering area 121 is between area of stress concentration 123 and junction surface 11, and above-mentioned area of stress concentration 123 is then between buffering area 121 and main part 10.In addition, above-mentioned area of stress concentration 123 more comprises a turnover 1231, and above-mentioned turnover 1231 comprises one of them of a fillet (R angle), obtuse angle or acute angle.
Generally speaking, when material can not produce displacement under external force, its geometry and size will change, and this deformation is called strain.And when material generation deformation, inside will produce equal and opposite in direction but reaction force in the opposite direction in order to opposing external force, this kind reaction force is a stress.
Hold the above; In the time of assembling flexible PCB 1 to connector 14; Above-mentioned connecting portion 12 need receive an external force can be pulled and be connected to connector 14, and when connecting portion 12 received external force, connecting portion 12 produced the stress in contrast to external force simultaneously in inside; And this stress concentrates on the turnover 1231 of connecting portion 12, just in the area of stress concentration 123.Therefore; One buffering area 121 is set on connecting portion 12,, avoids connecting portion 12 to make turnover 1231 generation strains and impaired because suffering stress in order to the suffered stress of buffering area of stress concentration 123; And then influence the conducting of circuit board, and the electronic building brick 13 of being located at main body 10 can't be acted on.
In the preferable example of first embodiment, above-mentioned buffering area 121 is the individual layer plate body, and area of stress concentration 123 is the multilayer plate body; Like Figure 10, shown in 11 and 12, wherein, x is a basic unit; Above-mentioned basic unit is an insulating substrate; Preferably can be polyester (Polyester, PET) or polyimide (Polyimide, PI); Y and y ' are the copper conductor layer; Z and z ' are cover layer.Said structure or material are merely example, and the present invention is not as limit.
Hold the above; In connecting portion 12 buffering area 121 of a multilayer plate body is set, utilizes the structural strength of the individual layer plate body that buffering area 121 has, let connecting portion 12 not be subject to stress and produce deformation; And then avoid circuit to be damaged; And when making junction surface 11 be connected to circuit control panel 15, can reach the function that signal transmits, can normal operation in order to circuit board.
3A to 8 of the present invention disclosed a second embodiment of the flexible wiring board 1, a flexible wiring board 1 of the connecting portion 12 may be changed to a variety of shapes, but the buffer 121 and the stress concentration area 123 for the shape of the connecting portion 12 , taking into consideration the position of the turning point 1231, and then design the buffer 12 and the stress concentration position of the distribution area 123, in which Fig 3A and 3B: the connecting portion 12 is an L-shaped; Figure 4: connection portion 12 is a linear type; Figure 5: the connecting portion 12 is a Z shape; Figure 6: connecting part 12 is a Y-shaped; Figure 7: connecting part 12 is an inverted Y-shaped; Figure 8: http connection portion 12 is a font.
Wherein, the buffering area 121 of above-mentioned icon must be between area of stress concentration 123 and junction surface 11, and area of stress concentration 123 must be contained turnover 1231, in order to strengthen the intensity that turnover 1231 meets with stresses.Be merely example about the buffering area 121 of present embodiment and the position and the area amplitude of area of stress concentration 123, the present invention is not as limit.
On the other hand; Aforementioned body 10 also can comprise the structure of a multilayer plate body, and is as shown in Figure 9, in order to increase the overall construction intensity of main body 10 and connecting portion 12; The position or the area amplitude of the multi-layer sheet body structure of aforementioned body portion 10 are merely example, and the present invention is not as limit.
According to the above, the area of stress concentration 123 that the connecting portion of flexible PCB 1 of the present invention 12 is set, it is the structure of multilayer plate body; Can increase the intensity that connecting portion 12 meets with stresses; Moreover 121 structures that are designed to the individual layer plate body of buffering area that connecting portion 12 is set avoid junction surface 11 that connector 14 is arched upward; Improve the circuit that is caused when flexible PCB 1 combines with the connector 14 of circuit control panel 15 by this and damage problem, and then promote the overall utility of flexible PCB.
The flexible PCB 1 that the third embodiment of the present invention disclosed comprises main part 10, junction surface 11 and connecting portion 12, and is as shown in Figure 5.
Connecting portion 12; Its two end connects aforementioned body portion 10 and junction surface 11 respectively; Above-mentioned connecting portion 12 comprises at least two areas of stress concentration 123 and a buffering area 121; Wherein above-mentioned at least two areas of stress concentration 123 lay respectively at two sides that connect connecting portion 12, and at least one side of buffering area 121 is adjacent to area of stress concentration 123.In addition, above-mentioned area of stress concentration 123 more comprises a turnover 1231, and above-mentioned turnover 1231 comprises one of them of a fillet (R angle), obtuse angle or acute angle.
In the preferable example of the 3rd embodiment, above-mentioned buffering area 121 comprises an individual layer plate body, and area of stress concentration 123 comprises a multilayer plate body.
The flexible PCB 1 that the fourth embodiment of the present invention disclosed comprises main part 10, junction surface 11, connecting portion 12 and coats material 16, and is shown in figure 13.
Connecting portion 12; Its two end connects aforementioned body portion 10 and junction surface 11 respectively; Above-mentioned connecting portion 12 comprises at least one area of stress concentration 123, and above-mentioned area of stress concentration 123 more comprises a turnover 1231, and above-mentioned turnover 1231 comprises one of them of a fillet (R angle), obtuse angle or acute angle.
Moreover above-mentioned connecting portion 12 comprises relative one first 12a and one second 12b.Wherein, above-mentioned coating material 16 can be located on first above-mentioned 12a with electronic building brick 13 1, yet above-mentioned coating material 16 can extend to second 12b by this first 12a, shown in Figure 15 A and 15B.
Above-mentioned coating material 16 must cover above-mentioned area of stress concentration 123; When flexible PCB 1 is assembled in the process of connector 14; Above-mentioned coating material 16 can absorb and cushion the stress that the area of stress concentration 123 of above-mentioned connecting portion 12 is born; Avoid connecting portion 12 to make turnover 1231 produce strains because suffering stress by this and impaired, and then influence the conducting of circuit board, and the electronic building brick 13 of being located at main body 10 can't be operated smoothly.Yet coating material 16 positions of present embodiment are merely example, and the present invention is not as limit.
In addition; Above-mentioned coating material 16 is a stickiness adhesive tape; Can flexible PCB 1 be pasted and be fixed to a pedestal (not icon), therefore, the coating material 16 that present embodiment disclosed not only has pastes fixing function; And have the effect of protection buffering, avoid the turnover 1231 of connecting portion 12 to produce damage because of meeting with stresses.Wherein, said base preferably can be the pedestal of backlight module, and said base is merely example, and the present invention is not as limit.
Though technology contents of the present invention discloses as above with preferred embodiment; Right its is not in order to limit the present invention; Anyly have the knack of this art; Not breaking away from spirit of the present invention a little change and the retouching done, all should be covered by in the category of the present invention, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (21)
1. flexible PCB comprises:
One main part disposes an electronic building brick;
One junction surface is connected in a connector; And
A junction, its two end connects this main part and this junction surface respectively, and this connecting portion comprises: a buffering area; And
One area of stress concentration, between this buffering area and this main part, and this buffering area is between this area of stress concentration and this junction surface, and this area of stress concentration comprises a turnover.
2. according to the flexible PCB of claim 1, it is characterized in that this turnover comprises one of them of a fillet (R angle), obtuse angle or acute angle.
3. according to the flexible PCB of claim 1, it is characterized in that this buffering area comprises an individual layer plate body.
4. according to the flexible PCB of claim 1, it is characterized in that this area of stress concentration comprises a multilayer plate body.
5. according to the flexible PCB of claim 1, it is characterized in that this electronic building brick comprises a light-emitting diode.
6. according to the flexible PCB of claim 1, it is characterized in that this connector is in order to be connected to a circuit control panel.
7. flexible PCB comprises:
One main part is provided with an electronic building brick;
One junction surface is provided with a connector; And
A junction; Its two end connects this main part and this junction surface respectively; And this connecting portion comprises at least two areas of stress concentration and a buffering area; Wherein this at least two area of stress concentration lays respectively at two sides of this connecting portion, and at least one side of this buffering area is adjacent to this area of stress concentration, and this each area of stress concentration comprises a turnover.
8. according to the flexible PCB of claim 7, it is characterized in that this turnover comprises one of them of a fillet (R angle), obtuse angle or acute angle.
9. according to the flexible PCB of claim 7, it is characterized in that this buffering area comprises an individual layer plate body.
10. according to the flexible PCB of claim 7, it is characterized in that this area of stress concentration comprises a multilayer plate body.
11. the flexible PCB according to claim 7 is characterized in that, this electronic building brick comprises a light-emitting diode.
12. the flexible PCB according to claim 7 is characterized in that, this connector is in order to be connected to a circuit control panel.
13. a flexible PCB comprises:
One main part disposes an electronic building brick;
One junction surface is connected in a connector;
A junction, its two end connects this main part and this junction surface respectively, and this connecting portion comprises an area of stress concentration, and this area of stress concentration comprises a turnover; And
One coats material, is positioned at this connecting portion.
14. the flexible PCB according to claim 13 is characterized in that, this coating material extends to this main part by this connecting portion and is positioned at the surface of this main part.
15. the flexible PCB according to claim 14 is characterized in that, this coats material between this electronic building brick.
16. the flexible PCB according to claim 13 is characterized in that, this turnover comprises one of them of a fillet (R angle), obtuse angle or acute angle.
17. according to the flexible PCB of claim 13, this coating material comprises a stickiness adhesive tape.
18. according to the flexible PCB of claim 13, this connecting portion comprises relative one first and one second, this coating material and this electronic building brick are positioned at this first.
19. according to the flexible PCB of claim 18, this coating material extends to this second by this first face.
20. the flexible PCB according to claim 13 is characterized in that, this electronic building brick comprises a light-emitting diode.
21. the flexible PCB according to claim 13 is characterized in that, this connector is in order to be connected to a circuit control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102461849A CN101877933B (en) | 2009-12-02 | 2009-12-02 | Flexible circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102461849A CN101877933B (en) | 2009-12-02 | 2009-12-02 | Flexible circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877933A CN101877933A (en) | 2010-11-03 |
| CN101877933B true CN101877933B (en) | 2012-06-27 |
Family
ID=43020367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102461849A Expired - Fee Related CN101877933B (en) | 2009-12-02 | 2009-12-02 | Flexible circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101877933B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI448239B (en) | 2010-03-29 | 2014-08-01 | Au Optronics Corp | Power transmission circuit with emi shielding, lighting module, and a panel display module |
| WO2016106735A1 (en) * | 2014-12-31 | 2016-07-07 | 深圳市柔宇科技有限公司 | Flexible display device and electronic apparatus |
| CN109524608B (en) * | 2017-09-20 | 2022-02-11 | 莫列斯有限公司 | Battery connection module |
| WO2019100295A1 (en) * | 2017-11-23 | 2019-05-31 | 深圳市柔宇科技有限公司 | Fan-out structure of display panel, and preparation method and application thereof |
| CN108449864B (en) * | 2018-05-18 | 2024-04-30 | 湖南粤港模科实业有限公司 | Cross FPC conductive flexible board |
| CN109166839B (en) * | 2018-08-30 | 2020-06-16 | 业成科技（成都）有限公司 | Area structure of bonding pad |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701646A (en) * | 2003-09-11 | 2005-11-23 | 摩托罗拉公司 | Electronic control unit |
| CN1752761A (en) * | 2004-09-21 | 2006-03-29 | 比亚迪股份有限公司 | Testing method of liquid crystal module manufacturing line and switching flexible printed circuit board |
| CN1791301A (en) * | 2004-12-13 | 2006-06-21 | 日本电气株式会社 | Flexible circuit board, electronic circuit device, and mobile communication terminal |
| CN1878446A (en) * | 2005-06-07 | 2006-12-13 | 三星电子株式会社 | Flexible printed circuit board for electronic device |
-
2009
- 2009-12-02 CN CN2009102461849A patent/CN101877933B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701646A (en) * | 2003-09-11 | 2005-11-23 | 摩托罗拉公司 | Electronic control unit |
| CN1752761A (en) * | 2004-09-21 | 2006-03-29 | 比亚迪股份有限公司 | Testing method of liquid crystal module manufacturing line and switching flexible printed circuit board |
| CN1791301A (en) * | 2004-12-13 | 2006-06-21 | 日本电气株式会社 | Flexible circuit board, electronic circuit device, and mobile communication terminal |
| CN1878446A (en) * | 2005-06-07 | 2006-12-13 | 三星电子株式会社 | Flexible printed circuit board for electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877933A (en) | 2010-11-03 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20120627 Termination date: 20201202 |